PAM setup including pam_fprintd

i've sucessfully set up encrypted home using pam_fscrypt. after that, i configured a fingerprint sensor for login (SDDM/console). that also worked pretty well, but when i rebooted i noticed that while i was able to log in using a fingerprint, my home was no longer decrypted, hence KDE won't start (SDDM hangs). i suspected this was due to the fact that obviously i didn't provide a password, so the protector can't be unlocked.

however, this issue remained even when i logged in with a password instead of a figerprint, and only went away after i completely deactivated pam_fprintd again. configuration was done using `pam-auth-update` on kubuntu 22.04 (fscrypt v0.3.3).

is there a proper way of cofiguring pam_fscrypt together with pam_fprintd?